SAKAGUCHI Daisaku

J-GLOBAL         Last updated: May 30, 2019 at 11:54
 
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Name
SAKAGUCHI Daisaku
Affiliation
Nagasaki University
Section
Graduate school of Engineering
Job title
Professor
Degree
Doctor (Engineering)(Nagasaki University)

Research Areas

 
 

Education

 
 
 - 
1992
Graduate School, Division of Engineering, Nagasaki University
 
 
 - 
1990
Faculty of Engineering, Nagasaki University
 

Published Papers

 
D. Sakaguchi, M. T. Tun, R. Numakura, B. T. Wang
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science   232 4461-4471   Dec 2018
© IMechE 2016. This paper describes a global optimization of a recirculation flow type casing treatment in centrifugal compressors of turbochargers. The global optimization for the recirculating flow type casing treatment has been performed based ...
Daisaku Sakaguchi, Daiki Sakue, Min Thaw Tun
Journal of Thermal Science   27(2) 111-116   Apr 2018   [Refereed]
© 2018, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature. A three-dimensional blade of a low solidity circular cascade diffuser in centrifugal blowers is designed by means of a mu...
Min Thaw Tun, Daisaku Sakaguchi
Journal of Thermal Science   25(3) 231-241   Jun 2016   [Refereed]
© 2016, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg. High-pressure ratio and wide operating range are highly required for a turbocharger in diesel engines. A recirculation flow type casing treat...
Noritsune Kawaharada, Daisaku Sakaguchi, Hironobu Ueki, Masahiro Ishida
Journal of Thermal Science and Technology   10(2)    Jan 2015   [Refereed]
© 2015 The Japan Society of Mechanical Engineers. A laser 2-focus velocimeter (L2F) was used for the measurement of diesel fuel sprays. Temporal and spatial changes in the number, velocity and size of droplets inside sprays were investigated near ...
Daisaku Sakaguchi, Min Thaw Tun, Kanata Mizokoshi, Daiki Kishikawa
Journal of Thermal Science   23 391-400   Jan 2014
High-pressure ratio and wide operating range are highly required for compressors and blowers. The technical issue of the design is achievement of suppression of flow separation at small flow rate without deteriorating the efficiency at design flow...
Shohei Yamamoto, Shohei Yamamoto, Shotaro Watanabe, Keisuke Komada, Daisaku Sakaguchi, Hironobu Ueki, Masahiro Ishida
SAE International Journal of Fuels and Lubricants   6    Sep 2013
In order to utilize bio-alcohols as the fuel for diesel engines, combustion characteristics of alcohol blended with gas oil were compared between ethanol and n-butanol in a direct injection diesel engine. In the case of the same cetane number betw...
Shohei Yamamoto, Daisaku Sakaguchi, Hironobu Ueki, Masahiro Ishida
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   79 2477-2485   Jan 2013
Utilization of bio-ethanol as an alternative fuel for diesel engines is one of the effective strategy for suppression of global warming because of its high thermal efficiency. In order to realize a premixed compression ignition (PCI) engine by uti...
Shohei Yamamoto, Daisaku Sakaguchi, Hironobu Ueki, Masahiro Ishida
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   79 380-389   Jan 2013
In order to realize a premixed compression ignition (PCI) engine by utilizing bio-alcohol, combustion characteristics of bio-alcohol blended with gas oil were compared between ethanol and n-butanol in a diesel engine. The effects of the ethanol bl...
Daisaku Sakaguchi, Takuji Fujii, Hironobu Ueki, Masahiro Ishida, Hiroshi Hayami
Journal of Thermal Science   21 384-390   Aug 2012
According to the previous experimental works on the low solidity circular cascade diffuser (LSD), a pressure recovery of a centrifugal blower was improved by the LSD significantly in a wide range of flow rate, and the pressure recovery was improve...

Misc

 
関新一郎, 斎藤学, 駒田佳介, 坂口大作, 植木弘信
内燃機関シンポジウム講演論文集(CD-ROM)   29th ROMBUNNO.7   Nov 2018
石橋善貴, 坂口大作
ターボ機械協会講演会(CD-ROM)   79th ROMBUNNO.C02   2018
関新一郎, 斎藤学, 駒田佳介, 坂口大作, 植木弘信
微粒化シンポジウム講演論文集   26th 124‐128   Dec 2017
原田光之亮, 日隈克将, 平山恒輝, TUN Min Thaw, 坂口大作
日本機械学会九州支部総会・講演会(CD-ROM)   70th 75‐76   Mar 2017
駒田佳介, 川原田光典, 宇田川和正, 鈴木浩高, 坂口大作, 植木弘信
日本機械学会論文集(Web)   83(845) ROMBUNNO.16‐00313(J‐STAGE)   2017
Min Thaw Tun, Daisaku Sakaguchi, Ryusuke Numakura, Baotong Wang
Proceedings of the ASME Turbo Expo   2D-2016    Jan 2016
Copyright © 2016 by ASME. In this paper, an optimization design approach to recirculation flow type casing treatment for centrifugal compressors of turbochargers has been performed. The optimization code is a global exploring system based on a met...
坂口大作, HUANG Yu‐Yu, 経塚雄策
ターボ機械協会講演会(CD-ROM)   78th ROMBUNNO.A12   2017

Works

 
Design of Turbomachinery by Multi-objective optimization
SAKAGUCHI Daisaku   Artistic Activity   Apr 2012 - Today

Research Grants & Projects

 
Study on Unstable Flow at Low Flow Rate in Centrifugal Blower
Development of Semiconductor Laser 2-Focus Velocimeter